vocalizing vs vocal music

vocalizing and vocal music both are nouns.

Word	Noun	Adjective	Verb	Adverb
vocalizing	Yes	No	No	No
vocal music	Yes	No	No	No

As nouns, vocal music is a hypernym of vocalizing; that is, vocal music is a word with a broader meaning than vocalizing:

vocalizing: the act of singing vocal music
vocal music: music that is vocalized (as contrasted with instrumental music)

Other hypernyms of vocalizing include musical performance.

vocalizing (noun)	vocal music (noun)
the act of singing vocal music	music that is vocalized (as contrasted with instrumental music)
	music intended to be performed by one or more singers, usually with instrumental accompaniment